Improvement in pump-valves



A P. C. GOBLE.

Pump-Valves.

Patented March I7, i874.

W'Lnesses Invnor @Vf z PALMER C. GOBLE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN PUMP-VALVES.

Specification formirg part of Letters Patent No. l-1,558, dated March17, 1374; applieationiiled July I7, 1873.

To all 'whom 'it may concern.'

Be it known that I, PALMER C. GOBLE, of the city of Chicago, in thecounty of Cook and State of Illinois, have invented a new and usefulImprovement in Pump-Valves, of which the following is a fulldescription, reference being had to the accompanying dra-wings, inwhich- Figure l is a vertical section '5 Fig. 2, a plan of the rubberring; Fig. 3, a vertical section ot' the same; Fig. 4, a detail, andFig. 5, a plan view of a valve.

It is customary to make valve seats in pumps of metal. If the valve-seatbe broad, and the pump be used in drive-wells or mines and similarplaces, sand is liable to accumulate on the valveseat, interfering withthe working ot' the pump. To obviate this ditliculty a narrowvalve-seat, made of metal, has been used, but is liable to the objectionthat the valve will be rapidly worn away.

The chief object ot' my invention is to obviate both of thesedifficulties and this I accomplish by making the valve-seat of rubber orother suitable elastic material, with a narrow surface.

In the drawings, A represents the lower part of the pump-cylinder, towhich the pipe leading to the water is connected at B in the usualmanner. Vith in the cylinder, and around the opening through which thewater enters into the pump, is a projection, a., cast with the cylinder,which serves to support the rubber ring which forms the valve-seat. Theoutside of this projection may slope inward a litt-le to prevent thering from slipping therefrom. b represents a rubber ring, broad at thebottom and narrow at the top, and of such width that, when in place, itprojects a little above the part a, as shown in Fig. l, and by thedotted line in Fig. 4. Its size is such that it can, without difficulty,pass over the projection a, but when in place will be firmly held there.The projection a may be quite narrow on the top. This rubber ring b fur=nishes a durable and efcient valve-seat. BeL ing very narrow at itsupper edge, sand cannot accumulate thereon, and, being elastic, thevalve itself will not be worn away by repeated contact with the seat. Asingle rubber ring will last a long time, even in places where much sandpasses into the pump, and if after a long time it becomes worn away, itcan be very readily replaced.

W'hile the chiet' object of this valve-seat is to obviatc thedifticulties which arise from the iiow of sand into the pump, it servesa useful purpose where there is no sand, furnishing an elastic seatwhich the valve will closely lit.

Fig. 5 represents' a valve in common use, which may bc used with myelastic seat, the outer portion c resting upon a shoulder within thecylinder, and the portion d forming the valve proper.

The ring I) might be compressed within the projection c, the same beingmade of suitable size and form to receive the ring, and havin g ashoulder at the bottom to support it.

That I claim as new is as follows:

lhe elastic valveseat b, in combination with projection c and valve dand cylinder A, constructed and operating substantially as and for thepurposes specified.

PALMER C. GOBLE.

lVitnesses:

E. A. VVEsT, O. XV. BOND.

